Limey makes a good point

That system, as Jefferson kept telling anyone who’d listen, depended on constantly changing the people at the top. If certain families got it into their heads that the republic was their plaything, America would descend into oligarchy as surely as if it had a hereditary nobility.

Are we really contemplating another Bush-Clinton contest in 2016? I mean, Jeb Bush strikes me as a decent sort and, as I’ve written here before, Republicans badly need Hispanic support. But in a nation of 320 million, the law of averages suggests that there must be some capable candidates with a surname other than Bush or Clinton.